fix: didn't show skim app windows (closes #772)

src/api-wrappers/AXUIElement.swift

@@ -73,7 +73,7 @@ extension AXUIElement {
         return nil
     }
 
-    func isActualWindow(_ runningApp: NSRunningApplication, _ wid: CGWindowID, _ isOnNormalLevel: Bool, _ title: String?, _ subrole: String?, _ role: String?, _ size: CGSize?) -> Bool {
+    func isActualWindow(_ runningApp: NSRunningApplication, _ wid: CGWindowID, _ level: CGWindowLevel, _ title: String?, _ subrole: String?, _ role: String?, _ size: CGSize?) -> Bool {
         // Some non-windows have title: nil (e.g. some OS elements)
         // Some non-windows have subrole: nil (e.g. some OS elements), "AXUnknown" (e.g. Bartender), "AXSystemDialog" (e.g. Intellij tooltips)
         // Minimized windows or windows of a hidden app have subrole "AXDialog"
@@ -84,7 +84,7 @@ extension AXUIElement {
             size != nil && size!.width > 100 && size!.height > 100 &&
             (books(runningApp) || keynote(runningApp) || (
                 // CGWindowLevel == .normalWindow helps filter out iStats Pro and other top-level pop-overs, and floating windows
-                isOnNormalLevel &&
+                level == AXUIElement.normalLevel &&
                     ([kAXStandardWindowSubrole, kAXDialogSubrole].contains(subrole) ||
                         openBoard(runningApp) ||
                         adobeAudition(runningApp, subrole) ||
@@ -161,11 +161,6 @@ extension AXUIElement {
         return title != "" && Applications.isAndroidEmulator(runningApp)
     }
 
-    func isOnNormalLevel(_ wid: CGWindowID) -> Bool {
-        let level: CGWindowLevel = wid.level()
-        return level == AXUIElement.normalLevel
-    }
-
     func position() throws -> CGPoint? {
         return try value(kAXPositionAttribute, CGPoint.zero, .cgPoint)
     }

src/api-wrappers/CGWindowID.swift

@@ -5,9 +5,13 @@ extension CGWindowID {
         return cgProperty("kCGSWindowTitle", String.self)
     }
 
-    func level() -> CGWindowLevel {
+    func level() throws -> CGWindowLevel {
         var level = CGWindowLevel(0)
         CGSGetWindowLevel(cgsMainConnectionId, self, &level)
+        // in some weird cases, a window can spawn with level == 1, which is not even a publicly listed level
+        if level == 1 {
+            throw AxError.runtimeError
+        }
         return level
     }
 

src/logic/Application.swift

@@ -85,7 +85,7 @@ class Application: NSObject {
                             let subrole = try $0.subrole()
                             let role = try $0.role()
                             let size = try $0.size()
-                            let isOnNormalLevel = $0.isOnNormalLevel(wid)
+                            let isOnNormalLevel = try $0.isOnNormalLevel(wid)
                             if $0.isActualWindow(self.runningApplication, wid, isOnNormalLevel, title, subrole, role, size) {
                                 return ($0, wid, title, try $0.isFullscreen(), try $0.isMinimized(), try $0.position(), size)
                             }

src/logic/events/AccessibilityEvents.swift

@@ -88,13 +88,13 @@ fileprivate func windowCreated(_ element: AXUIElement, _ pid: pid_t) throws {
         let role = try element.role()
         let isFullscreen = try element.isFullscreen()
         let isMinimized = try element.isMinimized()
-        let isOnNormalLevel = element.isOnNormalLevel(wid)
+        let level = try wid.level()
         let position = try element.position()
         let size = try element.size()
         DispatchQueue.main.async {
             if (Windows.list.firstIndex { $0.isEqualRobust(element, wid) }) == nil,
                let runningApp = NSRunningApplication(processIdentifier: pid),
-               element.isActualWindow(runningApp, wid, isOnNormalLevel, axTitle, subrole, role, size),
+               element.isActualWindow(runningApp, wid, level, axTitle, subrole, role, size),
                let app = (Applications.list.first { $0.pid == pid }) {
                 let window = Window(element, app, wid, axTitle, isFullscreen, isMinimized, position, size)
                 Windows.appendAndUpdateFocus(window)
@@ -116,13 +116,13 @@ fileprivate func focusedWindowChanged(_ element: AXUIElement, _ pid: pid_t) thro
         let role = try element.role()
         let isFullscreen = try element.isFullscreen()
         let isMinimized = try element.isMinimized()
-        let isOnNormalLevel = element.isOnNormalLevel(wid)
+        let level = try wid.level()
         let position = try element.position()
         let size = try element.size()
         DispatchQueue.main.async {
             if let windows = Windows.updateLastFocus(element, wid) {
                 App.app.refreshOpenUi(windows)
-            } else if element.isActualWindow(runningApp, wid, isOnNormalLevel, axTitle, subrole, role, size),
+            } else if element.isActualWindow(runningApp, wid, level, axTitle, subrole, role, size),
                       let app = (Applications.list.first { $0.pid == pid }) {
                 let window = Window(element, app, wid, axTitle, isFullscreen, isMinimized, position, size)
                 Windows.appendAndUpdateFocus(window)